Method and machine for making paper tubes



- Dec. 15 1925- P. GANGLER METHOD AND MACHINE FOR MAKING PAPER TUBE Filed Oct. 31. 1922 5 Sheets-Sheet l Dem 15, 1925 1,555,635

. P. GANCSLER METHOD AND MACHINE FOR MAKING PAPER TUBES Filed mi. 51.1922 s Sheets-Sheet 2 P. GANGLER METHOD AND MACHINE FOR MAKING FAPERTUSES Bees. 15, 1925' 5 Sheets-Sheet '3 Filed Oct. 31, 1922 fiiik Dec.15, 1925.

P. GANGLER METHOD AND MACHINE FOR MAKING PAPER TUBES Filed Oct. 31, 19225 sheets sheet 4 I '1 I l W W/ WM 2 M 1 4 3 /4 0 A p W/ g M m 4 1/ w v 3w P. GANGLER METHUD AND MACHINE FOR MAKING PAPER TUBES Filed Oct. 31,1922 5 Sheets-Sheet 5 v Fig. 7. 30 I i; aillllflllllllll llll PatentedDec. 15, 1925.

UNITED STATES PAUL GANGLER, OF ESSLINGEN, GERMANY, ASSIGNOIR TO THE FIRMFR. HESSER MASCHINENFABRIK-AKTIENGESELLSCHAFT, OF STUTTGART-CANNSTATT,GER- MANY.

PATENT OFFICE.

METHOD AND MACHINE FOR MAKING PAPER TUBES.

Application filed October 31, 1922. Serial No. 598,187.

To all whom it may concern:

Be it known that I, PAUL GANGLER, a citizen of the Republic ofWurttemberg, residing at 53 Panoramastrasse, Esslingen, Germany, haveinvented certain new and useful Improvements in Methods and Machines forMaking Paper Tubes, of which the following is a specification.

My invention relates to a machine for making tubes or shells from paperor other suitable material, which are closed at one end, such tubesbeing used for packing gun powder or the like. It is an object of myinvention to provide a simple, efiicient, and reliable machine for thepurpose specified. The tubes are made in such manner that they willretain their shape under all circumstances.

In the drawings affixed to this specification and forming part thereof amachine embodying my invention is illustrated diagrammatically by way ofexample. In the drawings Fig. 1 is a side elevation of part of themachine,

Fig. 2 a plan of Fig. 1,

Fig. 3 a front-elevation of Fig. 2 viewed from the left,

Fig. 4 an elevation of the severing device,

Fig. 5 an elevation and Fig. 6 a plan of the device for closing thebottom of the tube,

Fig. 7 the wrapping device on a larger scale in sectionalside-elevation,

Fig. 8 a cross-section along line VII-VII of Fig. 7

i Fig. 9 a similar cross-section with the parts in a different position,and

Fig. 10 a side-elevation of the automatic stoppin mechanism, viewed fromthe righthand side in Fig. 2.

Referring first to Fig. 1 a pulley 3 is loosely mounted on a shaft Cwith which it may be connected by a clutch 16. The clutch is operated bya lever 17, which is fulcrumed at 19 on a bracket 15 of a casting 15secured to the foundation plate of the ma chine. A rod 21 guided insleeves 15 and 45 is provided with an abutment 17 and a coiled spring 29which tends to throw out the clutch and to stop the machine.

Normally rod 21 is locked by a mechanism comprising an exchangeableratchet wheel 56 on a shaft 57 and pawls 92 and 94 adapted to engage theteeth of the wheel 56.

The purpose of this mechanism is to stop the machine when apredetermined number of tubes has been made. The number of teeth of theratchet wheel is equal to the number of tubes which shall be produced atone setting, say '25. The tubes are formed on a mandrel 20. A block 100at the end of a lever 110. mounted on a shaft 101 compresses the end ofthe tube after it has been closed and returns to its initial position(shown in Fig. 2) when a tube is stripped from the mandrel. Everymovement of the lever 110 feeds the ratchet wheel 56 forward one toothby means of a lever 91 and its pawl 92 until the desired number of tubeshas been produced. A dog 111 provided on the ratchet wheel releases therod 21 after the completion of a set of tubes and allows a spring 29 tothrow out the clutch 16. This automatic stopping device forms no part ofthe present invention and is therefore not described in detail.

The driving shaft C causes rotation of the main shaft A of the machinethrough the medium of a pinion 5 which meshes with a spur wheel 4 on theshaft A. Shaft A is supported at one end in the casting 15 on which isformed the bracket 15', and by any suitable means, not shown, at theother.

The material from which the tube is to be formed a strip P of papercardboard or the like is drawn from a supply (not shown) by rollers 1and 2 (Fig. 1) and fed intermittently on a table T a length equal to thesize of the sheet B which is required for making one tube. The sheet Bis held down on the table T by means well known in the art and thereforenot shown. The device for intermittently feeding the material P is alsoknown in the art and not shown either. On the right of the rollers 1, 2in Figs. 1 and 2 is disposed a printing and numbering apparatus of anyknown and therefore not shown construction, by means of which the web ofpaper is provided with any desired printed matter and also consecutivenumbering after each forward motion. This impression is placedin such aposition that it is situated at the right-hand edge ofthe subsequentlycut off leaf of paper B,

as indicated at S in Fig. 2. In this manner, the possibility is given toprovide the tubes with any desired printing at the outside.

The severing device is so arranged in relation to the table T that theweb of paper is cut through obliquely, so that the sheet of paper B cutoff has the rhombic shape shown in Fig. 2, and possesses a projectingcorner at the front as well as at the back. This manner of cutting offthe individual leaves from the continuous web is extremely important,inasmuch as the corner at the front of the leaf facilitates theintroduction of the leaf B into the wrapping or folding device, andbecause the corner at the rear which is utilized to form the bottom ofthe tube, effectively prevents the unwrapping of the tube or shell.

The paper serving device, Figs. 1, 2 and 4, consists in the present caseof a shearlike construction, a movable knife 6 pivoted on the bolt 8cooperating with a stationary cutting edge of the table T and beingswung up and down by the aid of a lever 7, link 10, the slide 11 uponthe rod 9, the bellcrank 12 and friction, roller 13 resting against thecam 14 fixed upon the driving shaft A.

A mandrel 20 serves for wrapping or folding the leaf B cut off into thetube or shell. One end of this mandrel is disposed in a suitableball-bearing 35, Fig. 7. The mandrel is recessed to a certain length andwidth, Figs. 79, for the reception of a gripper adapted to engage theleading point of the cut-off sheet B. In the present case, this deviceconsists of a finger 22, which by a spindle 109 and bearings 23, 24 witheyes is hinged within the recess of the mandrel. Upon the spindle 109 isalso fulcrumed a double-armed swing lever 25, one arm of which is actedupon by a spring 26 fixed upon the mandrel, and the other arm of whichis controlled by a lever 27 fulcrumed at 28 which by means of a link 28is oscillated in any Well-known manner, for instance, by a lever 151pivotally supported at 150 to which the link 28 is pivoted at 152. Apull-back spring 153 connected to the lever 27 tends to hold the lever151 with its roller 154 against the face 155 of a cam 156 secured on themain shaft A. In its extremest outer position represented in Fig. 8, thelever 27 sets the lever 25 free, so that its arm which is under theaction of the spring 26, is forced against the gripperplate 22, which inits turn is pressed against the mandrel, whereby the leading point ofthe sheet B is gripped and held by it. In its inner position shown inFig. 9, the lever 27 turns the lever 25 against the resistance of thespring 26 into such a position, that the spring 26 is raised andreleases the gripper 22, which in its turn releases the corner of thesheet of paper.

The rotation of the mandrel is effected by the following device: On thebolt 42 is fulcrumed a bellcrank lever 42, one arm of which is furnishedwith a bowl 43, which runs in a circular groove 44 with an inclinedplane provided in a barrel 108 keyed upon the driving shaft A, whereby acontinuous oscillating motion is imparted to the lever 42. The other armof the bellcrank 42 is formed as a toothed segment 142, which mesheswith a pinion 41 revolving upon a bolt 40. ith this pinion cooperates apawl 38 pivoted at 39 upon a spur wheel 37 also revolving upon the bolt40 in such a manner, that when the pinion 41 is rotated clockwise by thesegment 142, the spur wheel 37 is also rotated clockwise by the pawl 38and through the spur wheel 36 also rotates the wrapping mandrel 20. Ifon the other hand the pinion 41 is turned in the opposite direction bythe segment 142, the pawl 38 slides over the teeth of the pinion 41 andremains inoperative, so that the mandrel 20 remains stationary. Abraking action is exert-ed upon the mandrel 20 by a brake disc 30 fixedupon it, Figs. 7-9, upon which can ride a brake shoe 31 fixed upon thelever 27 by means of a spring 32.

The formation of the bottom of the tube is efiected by the foldingslides 60, 65, 76 and 81. The side slides 76, 81 are fixed upon levers77, 80, pivoted at 79 and kept in contact with a cam 83 upon a shortshaft 84 by means of bowls 78, 82. The motion of the cam 83 is effectedby means of a link 85 from a lever 86 fulcrumed at 87, which by a crank88 with bowl 89 is operated from a cam 90.

The lower folding slide 60 is fixed upon a sleeve 61, which is adaptedto slide upon a guide-post 69 and is moved up and down by a link 62 anda lever 63 in a well-known manner from a suitable driving device notshown.

The folding slide 65 is pivoted upon the bolt 67 of a sliding carriage72, which is vertically reciprocated upon the guide-post 69 by means ofa link 73 and driving lever 74. The folding slide 65 is held with thelever 66 against a roller 71 upon a bolt fixed upon the post 69 by aspring 68, the lever 66 being so arranged or shaped, that the folder 65performs a swinging movement towards the mandrel during its downwardmotion.

The ejecting device for the finished paper tubes consists of a rod 50slidably disposed within the mandrel, which is moved to and fro by meansof a link 52 hinged at the head 51 of the rod, double-armed lever 53,connecting link 54 and double-armed lever 58 with bowl, 59 bearingagainst a cam upon the first-motion shaft A.

In order to more effectively prevent a bursting open of the tube byforcing its hottom inwards, the head of the ejecting rod 50 is madeconcave at 210', and with this cavity cooperates a convex punch 100,which is fixed upon the shaft 101 rotatably mounted in the standard 102by an arm 110. The shaft 101 has a rocking motion imparted to it by acrank 103, link 104 and bellcrank lever 105 with bowl 106 operated by acam upon the shaft A.

When the bufier 100 is moved from the position shown on Fig. 2 into itsoperative position to compress the end of a tube on the mandrel 20 theratchet wheel 56 is rotated one tooth by the pawl 92 on the lever 91.This is repeated each time a tube is formed until the ratchet wheel 56has been rotated a certain number of teeth, whereupon the rod 21 isreleased, throwing out the clutch 16 and stopping the machine.

The tube is formed in the following manner: When the paper is fedforward, the leading corner passes between the open gripper 22 and themandrel, Fig. 9, whereupon the gripper 22 is closed and tightly gripsthe leading corner between itself and the recess of the mandrel. After aleaf B has been cut off the web of paper, the mandrel has the number ofrevolutions required to form the tubular shell imparted to it by theoperating device described, whereupon the mandrel is subjected to abraking action by the braking device described and then the bottom isformed first by the upper slide 65, then the lateral slides 76, 81 andfinally by the lower slide 60. After the slides have receded, the punch100 advances and forces the folded bottom into the concave recess 210'.During the braking of the wrapping mandrel, the gripper 22 has releasedthe corner of the sheet B which it clamped up to them, so that the shellcan be stripped off the mandrel by the rod 50 and ejected into the chute200.

After the set of finished tubes has been removed from the machine, thelever 17 is operated by hand to throw in the clutch 16, and locked inits position by the rod 21, whereupon the next set is started.

It will be understood that I do not limit myself to the exact details ofthe machine shown by way of example, but that these details may bemodified in various ways without departing from the spirit of theinvention or sacrificing any of its advantages.

I claim 1. Machine for making paper tubes comprising a mandrel, meansfor rotating said mandrel, means for feeding tube ,fforming materialtowards said mandrel, means for cutting rhombic sheets from thematerial, means for operating said cutting means, a gripper hinged in arecess of said mandrel and adapted to engage the leading point of therhombic sheet and means for operating said gripper.

2. Machine for making paper tubes comprising a mandrel, means forrotating said mandrel, means for feeding tube forming material towardssaid mandrel, means for cutting rhombic sheets from said material, agripper hinged in a recess of said mandrel and adapted to engage theleading point of the rhombic sheet, a double armed lever fulcrumed onthe hinge pin of said gripper, a spring adapted to act on one arm ofsaid double armed lever and to close said gripper, a lever adapted todepress the other arm of said double armed lever and means foroscillating said depressing lever.

3. Machine for making paper tubes comprising a mandrel, means forrotating said mandrel, means for feeding tube forming material towardssaid mandrel, means for cutting rhombic sheets from said material, agripper hinged in a recess of said mandrel, means for operating saidgripper, mechanism for folding the endof the paper tube projectingbeyond said mandrel comprising an upper folder, two lateral folders anda lower folder and means for operating said folders in succession.

4. Machine for wrapping paper tubes comprising a shaft, a mandreladapted to rotate about said shaft, a toothed segment adapted to rotatesaid mandrel, means for intermittently rocking said toothed segment,means for feeding tube forming material towards said mandrel and meansfor cutting the material into sheets of predetermined size.

5. Machine for wrapping paper tubes comprising a shaft, a mandreladapted to rotate about said shaft, a toothed segment adapted to rotatesaid mandrel, a cam operatively connected with said toothed segment andadapted to impart intermittent rotation thereto, means for rotating saidcam, means for feeding tube forming material towards said mandrel andmeans for cutting the material into sheets of predetermined size.

6. Machine for making paper tubes comprising a mandrel, means forrotating said mandrel, means for feeding tube forming material towardssaid mandrel, means for cutting rhombic sheets from the material, meansfor operating said cutting means, a brake drum on said mandrel, a brakeblock adapted to cooperate with said mandrel and automatic means forapplying said brake block to said drum.

7. Machine for making paper tubes comprising a mandrel, means forrotating said mandrel, means for feeding tube forming material towardssaid mandrel, means for cutting rhombic sheets from said material, agripper hinged in a recess of said mandrel and adapted to engage theleading point of the rhombic sheet, a brake drum on said mandrel, adouble armed lever fulcrumed on the b i x hinge pin of said gripper, aspring adapted to act on one arm of said double armed lever and to closesaid gripper, a lever adapted to depress the other arm of said doublearmed lever, a brake block adapted to be applied to said brake drum andautomatic lneans for operating said gripper and applying said brakeblock.

8. Machine for making paper tubes comprising a mandrel, means forrotating said mandrel, means for feeding tube forming material towardssaid mandrel, means for cutting rhombic sheets from said material, agripper hinged in a recess of said mandrel PAUL GANGLER.

